You probably want 1-2″ of water per week, depending on your vegetation. Measure water by placing a cup or other container in each zone. Run the system for a regular cycle and measure the amount of water in the container. This will tell you how long your system needs to run to get the right amount of water.
At the end of the season in colder regions you may need to blow out residual water from the system before the ground freezes. Compressed air is the normal “tool” used. Find a pro to do this task. Exposed backflow preventers and valves may need to be protected from freezing.
Part of your ongoing maintenance program is observation. Don’t wait for brown spots to appear to look for a clogged sprinkler head or pipe.